I am the new owner of this TRI EDC actually. Here are the symptoms of the light in question...
Pick up the light when it's cold and it works great. It cycles through the modes fine, and functions as one would expect.
Now, turn the light on and let it run for 30 seconds on high, and the problems start. And yes, I timed it, 30 seconds on high and it goes from working fine to skipping medium mode, and pre-flashing on low a little bit as well.
The light is NOT flashing high, low, high, low as previously mentioned.
If you run it for 30 seconds, and then try to cycle through the modes you end up with a sequence something like this:
H-L-H-L-H-L-H-L-H-L-H-L-M-M-M-H-L-H-L-H-L-H-L-H-L
So basically, after 30 seconds of run time, it totally looses medium mode. It just cycles H-L-H-L-H-L as you press the switch, until it cools down for a minute or two, then it works fine again.
I just got this light yesterday. I have had it less than 24 hours and have only ran it on high for 1-2 minutes continuous at the most.
I have run it on 18350 IMR's, AW rcr123's as well as a 16340 LiFePO4. It does not matter what battery I use.
After 30 seconds of run time, it starts to malfunction big time.